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CAS 78-21-7

CAS 78-21-7 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 78-21-7
CAS 78-21-7PubChem CID 60971

Morpholinium, 4-ethyl-4-hexadecyl-, ethyl sulfate (1:1)

The CIR Expert Panel concludes that the available data are insufficient to support the safety of Cetethyl Morpholinium Ethosulfate for use in cosmetic products. — Cosmetic Ingredient Review (CIR)

IUPAC name
4-ethyl-4-hexadecylmorpholin-4-ium;ethyl sulfate
Molecular formula
C24H51NO5S
Molecular weight
465.7 g/mol
Exact mass
465.34879490 Da
Topological polar surface area
84.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
5
Covalent units
2
Defined stereocentres
0

Also known as

Quaternium-25Atlas G 263Morpholinium, 4-ethyl-4-hexadecyl-, ethyl sulfateCetethyl morpholinium ethosulfateN-Cetyl-N-ethylmorpholinium ethyl sulfateG 251G 263G-263
16 more reported names
4-Ethyl-4-hexadecylmorpholinium ethyl sulfate4-Ethyl-4-hexadecyl morpholinium ethyl sulfateCetyl ethyl morpholinium ethosulfateFU19SYM476BARQUAT CMENSC-215231Sulfuric acid, monoethyl ester, ion(1-), 4-ethyl-4-hexadecylmorpholiniumG-251RefChem:124690201-094-8Barquat cme-ACETYLETHYLMORPHOLINIUM ETHOSULFATEN-Cetyl-N-ethylmorpholinium ethosulfateN-Cetyl-N-ethylmorpholinium ethylsulfateEthyl-N-hexadecylmorpholinium ethosulfateN-Hexadecyl-N-ethylmorpholinium ethyl sulfate
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External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 78-21-7

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How CAS 78-21-7 is used on this site

CAS 78-21-7 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 78-21-7 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.